San Mateo, California Population 2021

103,520
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San Mateo is a city located in California. With a 2020 population of 103,520, it is the 69th largest city in California and the 304th largest city in the United States. San Mateo is currently declining at a rate of -0.44% annually but its population has increased by 6.49% since the most recent census, which recorded a population of 97,207 in 2010. San Mateo reached it's highest population of 104,885 in 2018. Spanning over 16 miles, San Mateo has a population density of 8,505 people per square mile.

The average household income in San Mateo is $165,420 with a poverty rate of 7.55%. The median rental costs in recent years comes to $2,475 per month, and the median house value is $1.10 Mn. The median age in San Mateo is 38.2 years, 36.5 years for males, and 40 years for females. For every 100 females there are 99.9 males.

San Mateo Demographics

According to the most recent ACS, the racial composition of San Mateo was:

  • White: 52.92%
  • Asian: 24.10%
  • Other race: 11.24%
  • Two or more races: 6.88%
  • Native Hawaiian or Pacific Islander: 2.51%
  • Black or African American: 1.96%
  • Native American: 0.39%
The current population of San Mateo, California is 103,520, based on our projections of the latest US Census estimates. The US Census estimates the 2018 population at 104,885.The last official US Census in 2010 recorded the population at 97,207.

San Mateo, California Population 2021

Population by Race

Race Population Percentage
White55,21652.92%
Asian25,14124.10%
Some Other Race11,73211.24%
Two or More Races7,1756.88%
Native Hawaiian and Other Pacific Islander2,6172.51%
Black or African American2,0441.96%
American Indian and Alaska Native4080.39%
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San Mateo Population by Race

San Mateo Population Pyramid 2021

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San Mateo Median Age

38.2


Total

36.5


Male

40


Female

San Mateo Adults

There are 82,506 adults, (16,093 of whom are seniors) in San Mateo.

San Mateo Age Dependency

57.1

Age Dependency Ratio

24.2

Old Age Dependency Ratio

32.9

Child Dependency Ratio

San Mateo Sex Ratio

Female

52,187

50.02%

Male

52,146

49.98%

San Mateo Population by Age

San Mateo Renter vs Owner Occupied by Household Type

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San Mateo Household Types

Type Owner Renter
Married63.4%36.6%
All54.4%45.6%
Female47.9%52.1%
Non Family45.1%54.9%
Male39.1%60.9%

54.4%

Rate of Home Ownership

San Mateo Households and Families

Type Count Average Size Owned
All38,5492.6754.4
Married19,5713.3663.4
Non Family14,1241.3345.1
Female3,4923.8847.9
Male1,3623.4939.1

3.27

Average Family Size

2.67

Average Household Size

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San Mateo Households by Type

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Education Attained Count Percentage
Less Than 9th Grade5,0476.72%
9th to 12th Grade2,6853.58%
High School Graduate10,07513.41%
Some College11,90715.85%
Associates Degree4,6836.24%
Bachelors Degree22,89030.48%
Graduate Degree17,81723.72%
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San Mateo Educational Attainment by Sex (over 25)

San Mateo Educational Attainment by Race

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Name Total High School Bachelors
White33,89732,91820,698
Asian19,98318,92414,156
Hispanic15,80910,4953,396
Other Race7,2014,3471,274
Multiple Races2,8992,7611,584
Islander1,5261,400425
Black1,4921,329519
Native American23620757

The highest rate of high school graduation is among white people with a rate of 97.11%.

The highest rate of bachelors degrees is among asian people with a rate of 70.84%.

San Mateo Educational Attainment by Race

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Name Average Male Female
Overall$70,705$79,965$62,122
Less Than High School$25,519$26,715$18,886
High School Grad$32,454$37,149$26,651
Some College$51,781$58,015$43,798
Bachelors Degree$90,703$106,606$74,747
Graduate Degree$120,305$145,716$96,167

$70,705

Average Earnings

$79,965

Average Male

$62,122

Average Female

San Mateo Earnings by Educational Attainment

San Mateo Language by Age

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San Mateo Language

56.80% of San Mateo residents speak only English, while 43.20% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 18.94% of the population.

San Mateo Language

San Mateo Poverty by Race

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Name Total In Poverty Poverty Rate
Hispanic25,9243,79714.65%
Other11,6552,32919.98%
White42,3451,9394.58%
Asian25,0651,1944.76%
Multiple7,1635397.52%
Islander2,61545617.44%
Black2,0091457.22%

7.55%

Overall Poverty Rate

6.83%

Male Poverty Rate

8.26%

Female Poverty Rate

Poverty in San Mateo

The race most likely to be in poverty in San Mateo is Other, with 19.98% below the poverty level.

The race least likely to be in poverty in San Mateo is White, with 4.58% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 1.63%. Among those working part-time, it was 8.08%, and for those that did not work, the poverty rate was 17.80%.

San Mateo Poverty

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Name Poverty
Less Than High School20.55%
High School14.06%
Some College6.01%
Bachelors or Greater2.85%

San Mateo Poverty Rate by Education

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Name Poverty
Female Unemployed11.40%
Male Unemployed10.42%
Male Employed3.81%
Female Employed3.51%

San Mateo Poverty Rate by Employment Status and Sex

San Mateo Income by Household Type

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Name Median Mean
Households$124,842$165,420
Families$145,793$191,322
Married Families$167,225$213,416
Non Families$82,209$111,979
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Income by Household Type

San Mateo Marital Status

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Marriage Rates

51.6%

Overall Marriage Rate

52.7%

Male Marriage Rate

50.4%

Female Marriage Rate

San Mateo Married by Age and Sex

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San Mateo Marriage

The age group where males are most likely to be married is Over 65, while the female age group most likely to be married is 35-44.

San Mateo Marital Status by Race

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San Mateo Marital Status

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2,681

Number of Veterans

2,537

Male Veterans

144

Female Veterans

War Veterans
Vietnam842
Korea448
First Gulf War346
Second Gulf War328
World War II210

San Mateo Veterans by War

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Age Group Veterans
75+1,157
65 to 74639
35 to 54493
55 to 64286
18 to 34106

San Mateo Veterans by Age

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Name Veterans % of Total
White1,9094.23%
Asian4292.00%
Hispanic2401.28%
Black1288.01%
2 or More1022.84%
Other540.62%
Hawaiian422.39%
Indian175.06%

San Mateo Veterans by Race

San Mateo Veterans by Education

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4.27%

Veteran Poverty Rate

32.66%

Veteran Disability Rate

San Mateo Veterans by Education

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71.2%

Labor Force Participation

68.6%

Employment Rate

3.7%

Unemployment Rate

San Mateo Employment by Age

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San Mateo Employment by Race

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San Mateo Employment by Education

Origin of Non-Citizens

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Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.

Origin of Naturalized Citizens

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47.27%

Born in California

65.31%

Native Born

34.69%

Foreign Born

17.72%

Non Citizen

16.98%

Naturalized

Place of Birth

65.31% of San Mateo residents were born in the United States, with 47.27% having been born in California. 17.72% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Asia.

San Mateo Place of Birth

Year Population Growth Annual Growth Rate
2021103,520-455-0.44%
2020103,975-455-0.44%
2019104,430-455-0.43%
2018104,8854960.48%
2017104,389320.03%
2016104,3578480.82%
2015103,5098140.79%
2014102,6951,3721.35%
2013101,3231,5071.51%
201299,8161,2981.32%
201198,5181,1351.17%
201097,3834,9010.52%
200092,4826,9960.79%
199085,4867,8460.97%
198077,640-1,351-0.17%
197078,9919,1211.23%
196069,87028,0885.28%
195041,78222,3797.97%
194019,4035,9593.74%
193013,4447,4658.44%
19205,9791,5953.15%
19104,3842,5529.12%
19001,8329003.44%
18809320.00%

San Mateo Population by Year